Use these two GM FM Antenna adapter cables to fully integrate the Delphi SA10003 FM Modulator or the Audiovox SA10112 FM Direct Adapter into any 1988 and up GM Vehicle.
GM vehicles have non-standard FM antenna plugs and require this adapter to use an FM Modulator.
Note: Cars require the additional use of the 40-GM21. The 40-GM21 connects the FM Modulator or FM Direct Adapter to your stereo, while the 40-GM10 connects the FM Modulator or FM Direct Adapter to your car antenna.
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